\begin{table}%t3
         \caption{\label{table:flux}Flux density and possible variability of the 12~GPS sources.}
%\centerline
{\small
         \begin{tabular}{cccccccccc}
            \hline\hline
            \noalign{\smallskip}
         %    1&2 &3 &4 & 5\\
Source & $S_{\rm PKS}$ & $S_{\rm Jan07}$ & $S_{\rm Jul07}$ & $S_{\rm Dec08}$ & $ S_{\rm Jul09}$ & $S_{\rm Nov09}$&$\overline{S_{Ur}}$ & $\sigma_{S_{Ur}}/\overline{S_{Ur}}$ & $(\overline{S_{Ur}}-S_{\rm PKS})/S_{\rm PKS}$\\
&(mJy)&(mJy)& (mJy) & (mJy) & (mJy) & (mJy)& (mJy) &(\%) & (\%) \\
            \noalign{\smallskip}
            \hline
            \noalign{\smallskip}
J0210+0419 &  300  &$302\pm10$&$282\pm2$& &$274\pm4$& $298\pm4$&289&4.0 &$-$3.7 \\
J0323+0534 &  830&$868\pm9$& $833\pm5$&$796\pm21$&$814\pm10$& $836\pm4$ &829&2.9&$-$0.1\\
J0433$-$0229 & 640 &$637\pm14$&$705\pm25$&$612\pm5$&&  &651&6.0&1.8\\
J0913+1454 & 300 &$297\pm8$&$289\pm3$&$275\pm18$&& $311\pm6$ &293&4.5&$-$2.3\\
J1057+0012& 370 & $351\pm6$ & $369\pm4$ & $355\pm21$ & $345\pm4$ & $373\pm14$ &359&3.0&$-$3.1\\
J1109+1043& 400 & $428\pm8$ & $416\pm5$ & $420\pm7$ & $434\pm4$ & $414\pm7$ &422&1.8&5.6\\
J1135$-$0021 &440  &$427\pm8$ &$392\pm4$ & $422\pm13$  &  &   &414&3.7 &$-$6.0 \\
J1203+0414&  520& $611\pm7$ &$561\pm3$& $590\pm21$ &$604\pm4$& $632\pm5$ &600&3.9&15.3 \\
J1352+0232 & 470 &  $469\pm7$  &$453\pm4$   & $458\pm10$ &$470\pm4$& $465\pm6$ &463&1.4&$-$1.5 \\
J1352+1107 & 410& $418\pm5$ &$406\pm3$ & $403\pm6$ &$411\pm3$& $432\pm3$&414&2.5&1.0 \\
J1600$-$0037 & 180   & $212\pm3$&$177\pm5$& $190\pm5$  & &   &193&\textbf{7.5}&\textbf{7.2}\\
J2058+0540 & 340 &  &$340\pm3$ & $351\pm18$   &  $343\pm4$ & $345\pm5$ &345&1.2&1.4\\
            \hline
           \end{tabular}}
           \tablefoot{Column 2 is the PKS90 flux density at 5.0~GHz. Columns~3 to~7
         indicate the 4.85~GHz flux density measured with the Urumqi telescope in January 2007,
         July 2007, December 2008, July 2009, and November 2009, respectively; Cols.~8--10
         give the mean flux density of the Urumqi data, the standard deviation of the Urumqi data
         divided by the mean value, and the relative variation between the mean flux density
         and the PKS90 data.}
   \end{table}